Observe good picking procedures – i.e. pick grapes at lower
temperatures. Cease when temperatures rise.
Observe industry procedures with regards to packing grapes after rains – cease packing for 2 days.
Do not allow picked grapes to remain in the heat.
Pack the grapes as soon as possible after picking.
The higher the ambient temperature the quicker the stems and fruit dry out.
The packhouse temperature should ideally be below or at 20°C but not below dew point.
Use a liner in the grape carton to minimize moisture loss.
Place the Uvasys sheet on top of the grapes in the carton, shiny printed side up, as per instructions on the sheet.
Use the correct size sheet for the size of the carton and the weight of grapes packed. If in doubt, contact us.
A Uvasys Dual Release sheet is used if no pre-fumigation with SO2 occurs.
If the grapes are to be fumigated with SO2, then use a Uvasys Slow Release sheet.
Uvasys is designed to be placed directly onto the table grapes. However, if desired, a MAM (Moisture Absorbing Membrane) sheet or tissue paper may be placed on top of the Uvasys sheet.
Close the liner over the Uvasys sheet and seal the carton. This ensures that the Sulphur Dioxide remains in the carton.
Place in cold room (preferably forced air cooling) as soon as possible to minimize decay and loss of moisture.
Best storage conditions are at -0.5°C and 95% Relative Humidity.